<template>
    <div class="todo-footer">
        <label>
            <input type="checkbox" v-model="isCheckedAll" />
        </label>
        <span>
            <span>已完成{{ doneNum }}</span> / 全部{{ todoList.length }}
        </span>
        <button @click="deleteAllDone" class="btn btn-danger">清除已完成任务</button>
    </div>
</template>
<script lang="ts">
import { defineComponent } from 'vue';
export default defineComponent({
    name: 'Footer'
})
</script>
<script lang="ts" setup>
import type { TodoData } from '@/App.vue';
import { computed } from 'vue';
const props = defineProps<{
    todoList: TodoData[],
    updateAllChecked(val: boolean): void,
    deleteAllDone: () => void
}>()
const doneNum = computed(() => {
    return props.todoList.reduce((prev, item) => {
        if (item.isDone) {
            prev += 1
        }
        return prev
    }, 0)
})
const isCheckedAll = computed({
    get() {
        return props.todoList.every(item => item.isDone) && props.todoList.length > 0
    },
    set(val) {
        props.updateAllChecked(val)
    }
})

const deleteAllDone = () => {
    props.deleteAllDone()
}
</script>

<style lang="less" scoped>
/*footer*/
.todo-footer {
    height: 40px;
    line-height: 40px;
    padding-left: 6px;
    margin-top: 5px;
}

.todo-footer label {
    display: inline-block;
    margin-right: 20px;
    cursor: pointer;
}

.todo-footer label input {
    position: relative;
    top: -1px;
    vertical-align: middle;
    margin-right: 5px;
}

.todo-footer button {
    float: right;
    margin-top: 5px;
}
</style>